1. Each year, around a quarter of the carbon dioxide found in the atmosphere
is turned into plant matter via photosynthesis. Does this mean that, in the
absence of human activity, all carbon dioxide would be removed from the
atmosphere in around four years?
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More than a quarter of the atmospheric CO2 pool is absorbed each year through the process of photosynthesis by a combination of plants on land (120 GtC) and at sea (90 GtC). ... Plants are called primary producers because they are the primary entry point of carbon into the biosphere.
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